WO2013020449A1 - 含有水性环氧涂料封面层的复合防腐内衬及其应用 - Google Patents

含有水性环氧涂料封面层的复合防腐内衬及其应用 Download PDF

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Publication number
WO2013020449A1
WO2013020449A1 PCT/CN2012/079032 CN2012079032W WO2013020449A1 WO 2013020449 A1 WO2013020449 A1 WO 2013020449A1 CN 2012079032 W CN2012079032 W CN 2012079032W WO 2013020449 A1 WO2013020449 A1 WO 2013020449A1
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WIPO (PCT)
Prior art keywords
lining
cover layer
cast iron
cement mortar
iron pipe
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PCT/CN2012/079032
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English (en)
French (fr)
Inventor
张同波
李军
李宁
刘延学
朱伟
申勇
赵福恩
葛华光
叶卫合
张永杰
商勃
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新兴铸管股份有限公司
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Application filed by 新兴铸管股份有限公司 filed Critical 新兴铸管股份有限公司
Priority to EP12822653.7A priority Critical patent/EP2740986A4/en
Priority to AU2012292776A priority patent/AU2012292776B2/en
Priority to IN297CHN2014 priority patent/IN2014CN00297A/en
Priority to BR112014002582-7A priority patent/BR112014002582B1/pt
Priority to EA201490330A priority patent/EA024617B8/ru
Publication of WO2013020449A1 publication Critical patent/WO2013020449A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/06—Coatings characterised by the materials used by cement, concrete, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe

Definitions

  • the invention relates to the use of an epoxy coating.
  • anticorrosive linings for cast iron pipes there are generally two kinds of anticorrosive linings for cast iron pipes, one is a general cement mortar lining, and the other is an organic coating anticorrosive lining.
  • Cement mortar lining has good anti-corrosion performance to ductile iron pipe, which is active anti-corrosion, but due to its inherent alkaline characteristics, it causes the pH value of water to rise in the initial stage of water transportation of pipelines, especially small-diameter pipelines, aluminum ions. The increase in the content affects the hygienic performance of the water.
  • Organic coating anti-corrosion lining (such as epoxy, polyurethane lining) Although this problem is solved, it is necessary to spray a layer of such lining on the inner wall of the cast iron pipe, the thickness of which must be 500 ⁇ m to achieve a certain anti-corrosion effect, which makes the price expensive.
  • This kind of anti-corrosion method is passive anti-corrosion.
  • CN1250856A discloses a fire-free ceramic-lined ductile iron pipe and a method for producing the same, which is composed of an epoxy resin and the like, and is directly sprayed on the inner wall of a ductile iron pipe, and has a coating thickness of 1-2 mm. Obviously, such a thickness necessarily requires an increase in production costs, and once such a coating is slightly damaged or leaked, such a point can cause a fatal disaster to the pipeline, and corrosion in these weak links is exacerbated, causing corrosion perforation.
  • Japanese Patent No. 3-14988 discloses a cast iron pipe anticorrosive lining.
  • the inner wall of the cast iron pipe 1 is coated with a layer of cement mortar lining 2 by centrifugal action, and then a layer is inserted on the cement mortar layer 2
  • This patented technology directly inserts a circular resin film into the surface layer of a cast iron cement mortar and uses shape matching to prevent it from peeling off.
  • the polyethylene material used herein has poor erosion resistance and is not easy to adhere to pure cement mortar.
  • the composite anticorrosive lining has the following advantages:
  • the water-based epoxy coating cover layer can inhibit the precipitation of alkaline substances and harmful components in the cement mortar to ensure the hygienic performance of the water;
  • the water-based epoxy coating cover layer can seal the moisture in the mortar It promotes the hydration reaction of cement mortar, which is good for health and prevents the generation of cracks.
  • the cover layer of water-based epoxy coating is combined with the cement mortar lining, which combines the active anti-corrosion of cement mortar lining with the passive anti-corrosion performance of organic coating, even If the epoxy cover layer is damaged or leaked, the cement mortar lining will provide active anti-corrosion to ensure the long-term corrosion resistance of the pipeline; the inner wall of the cast iron pipe with composite anti-corrosion lining is smooth, which can reduce the roughness of the cement mortar lining.
  • the coefficient of the ratio has the effect of improving the hydraulic performance compared with the cement lining; the composite anticorrosive lining can withstand the rise and fall of the water pressure during the water delivery process, and the anticorrosive lining is not damaged; in addition, the composite anticorrosive lining is integrated.
  • the cost is much lower than the anti-corrosion lining of organic coatings, which can effectively reduce the overall cost of the pipeline.
  • the invention comprises a composite anticorrosive lining comprising a cover layer of a waterborne epoxy coating, which consists of a cement mortar inner liner and a waterborne epoxy paint cover layer coated on the cement mortar inner liner.
  • the present invention comprises a composite anticorrosive liner comprising a cover layer of a waterborne epoxy coating, wherein the aqueous epoxy coating of the waterborne epoxy coating cover layer is composed of an A component and a B component, wherein
  • Component A consists of the following components in mass percent:
  • Epoxy resin E-51 10.0-50.0%
  • Component B consists of the following components in mass percent:
  • the waterborne epoxy resin curing agent refers to a modified polyamide having a self-emulsification effect or a modified aliphatic amine having a self-emulsification effect or an epoxy-polyamine addition product having a self-emulsification effect, and a thickness of a cover layer of a water-based epoxy coating material. It is 20-250 ⁇ .
  • the above mass percentage refers to the mass percentage of the corresponding component in the aqueous epoxy coating.
  • Allyl glycidyl ether is abbreviated as AGE
  • butyl glycidyl ether is abbreviated as BGE.
  • the composite anticorrosive liner comprising a cover layer of a waterborne epoxy coating, wherein the aqueous epoxy coating of the waterborne epoxy coating cover layer is composed of an A component and a B component, wherein
  • Component A consists of the following components in mass percent:
  • Epoxy resin E-51 15.0-30.0%
  • Component B consists of the following components in mass percent:
  • the composite anticorrosive liner containing the cover layer of the waterborne epoxy paint wherein the self-emulsifying modified polyamide is preferably: ANQUAMINE 360, ANQUAMINE 287 produced by American Gas Chemical Company; the self-emulsifying modified aliphatic amine is preferably : Shell company's 8573-wy-60; American gas company's ANQUAMINE 701, ANQUAMINE72K ANQUAMINE777; Jiangsu Shengjie Special Epoxy Co., Ltd.
  • the adduct is preferably: a composite anticorrosive liner of the present invention comprising a cover layer of a waterborne epoxy paint produced by Qingdao Marine Chemical Research Institute, wherein the pigment filler is preferably: titanium dioxide and/or talc and/or quartz powder and/or Or carbon black and / or precipitated barium sulfate.
  • the composite anticorrosive liner comprising a cover layer of a waterborne epoxy paint, wherein the thixotropic agent is organic bentonite or silica or hydrogenated castor oil; the antifoaming agent is a nonionic surfactant or ether modified poly a silicone-based antifoaming agent or a bis-surfactant or a molecular-level antifoaming agent; the wetting and dispersing agent is a nonionic surfactant or a polymeric wetting dispersing agent or a bis-surfactant or a high molecular weight wetting agent Dispersant.
  • the thixotropic agent, antifoaming agent, wetting and dispersing agent in the present invention are all conventionally selected.
  • the antifoaming agent is a molecular grade antifoaming agent, it is preferably: Surfynol MD 20 or Surfynol MD30; when the antifoaming agent is a nonionic surfactant, preferably a Surfynol 400 series product; the defoaming agent is an ether modified polysilicon In the case of an oxyalkyl defoamer, it is optional: Surfynol DF-62 or Foamex 815N or Foamex 822; when the antifoaming agent is a bis-surfactant, EnviroGem AD01 is preferred.
  • the Surfynol 400 series product may be selected, preferably Surfynol 420, when the wetting dispersing agent is a polymeric wetting and dispersing agent, preferably TEGO Dispers 715W; the wetting dispersing agent is double In the case of a surfactant, TEGO Twin 4000 or EnviroGem ADO 1 is preferred; the wetting dispersant is a high molecular weight wetting and dispersing agent, preferably DISPERBYK-190.
  • the present invention comprises a composite anticorrosive liner comprising a cover layer of a waterborne epoxy coating, wherein the thickness of the cover layer of the aqueous epoxy coating is preferably from 40 to 250 ⁇ m, more preferably from 40 to 200 ⁇ m.
  • the composite anticorrosive lining of the invention comprises a cover layer of a waterborne epoxy coating, wherein the raw material of the cement mortar inner lining consists of the following components by mass: Portland cement or sulfate resistant cement: 100 parts, river Sand: 100-150 parts, water: 30-70 parts, water reducing agent: 0-1.5 parts.
  • the water reducing agent may be selected from the group consisting of: a polycarboxylic acid-based high performance water reducing agent.
  • the composite anticorrosive liner of the present invention comprises a cover layer of a waterborne epoxy coating, wherein the cement mortar inner liner has a thickness of from 1.5 to 15 mm; preferably from 3 to 13 mm; more preferably from 5.5 to 10 mm.
  • the thickness of the cement mortar inner lining varies according to the pipe diameter. For the inner wall of the cast iron pipe, the minimum thickness of 1.5 mm cement mortar lining is sufficient to ensure the corrosion resistance of the cast iron pipe. However, the cast iron pipe will have cast iron inside the casting process.
  • the slag layer the larger the pipe diameter, the thicker the slag layer, the thinner the thickness of the cement mortar lining will not cover the cast iron slag layer; of course, the cement mortar lining is too thick, which will cause waste of raw materials, which will not only reduce the inner diameter. It also causes difficulties in coating the epoxy coating.
  • the resulting cement mortar lining is in accordance with ASTM D4541 and has a pull strength of 2-8 MPa.
  • the invention relates to a method for manufacturing a composite anticorrosive lining comprising a cover layer of a waterborne epoxy paint, which comprises the following steps: (1) manufacturing, curing and surface treatment of cement mortar inner liner, (2) using high pressure airless spraying
  • the epoxy coating is applied to the surface treated cement mortar inner liner by a roll coating method, wherein the aqueous epoxy coating is manufactured as follows:
  • Epoxy resin E-51 is uniformly mixed with a reactive diluent, wherein the reactive diluent means allyl glycidyl ether and/or butyl glycidyl ether.
  • B component manufacturing method Add all the required epoxy resin curing agent to the container, and mix 80 80% by mass of the desired deionized water, 20% to 40% by mass of the desired defoamer, all under slow stirring.
  • the required wetting and dispersing agent, all the required pigments and fillers are slowly added, and then the speed is increased to 1000 minutes at 1000 rpm to 2000 rpm, then sanded to a fineness of 40 um, and finally the remaining water and the remaining defoaming agent are added. All the required thixotropic agents were mixed at a low speed of 200-600 rpm for 30 min and filtered.
  • the A component and the B component are mixed and used now.
  • the present invention has a composite anticorrosive lining cast iron pipe composed of a cast iron pipe and one of the above composite anticorrosive linings lining the inner wall of the cast iron pipe.
  • the invention has a cast iron pipe with a composite anticorrosive lining, wherein the cast iron material of the cast iron pipe is ductile iron.
  • the invention relates to a cast iron pipe fitting with a composite anticorrosive lining, which is composed of a cast iron pipe fitting and a lining on the inner wall of the cast iron pipe fitting
  • the composite anticorrosive lining is composed.
  • the invention has a cast iron pipe fitting with a composite anticorrosive lining, wherein the cast iron material of the cast iron pipe fitting is ductile iron.
  • the specific preparation process of the cast iron pipe or the pipe fitting with the composite anticorrosive lining of the invention is as follows:
  • This step is a prior art.
  • the cement mortar mixture is placed on the inner wall of the cast iron pipe by screw feeding or pumping while rotating on the centrifuge through the cast iron pipe, and It is evenly distributed in the axial direction of the ductile iron pipe, and then the cast iron pipe is rotated at a high speed, and the cement mortar lining is evenly distributed by centrifugal action to form a cement mortar inner lining; in this way, the cement mortar lining is closely matched with the cast iron pipe.
  • the wall is attached to each other to increase the adhesion between the cement mortar lining and the cast iron pipe wall, and to reduce defects such as hollow drums.
  • This step is prior art.
  • the cement mortar lining is sprayed or hand-applied. Spraying the cement mortar through the high-speed rotating nozzle to the inner surface of the pipe, or using a mortar spray gun to pass the compressed air The cement mortar is sprayed onto the inner surface of the pipe to form a cement mortar inner liner of a certain thickness.
  • the cement mortar inner liner is maintained by steam curing method.
  • the curing temperature is 40°C-80°C, the humidity is over 90%, and the curing time is between 7h-12h.
  • This kind of health preservation method can make the cement mortar lining. 28 days of natural health intensity with a strength of more than 70% in a short period of time;
  • the surface of the cement mortar inner liner is treated by internal grinding and/or pressure water washing and/or sand blasting to remove surface slurry and other dirt; using pressurized water flushing or high pressure wind blowing Take dirt such as dust from the cement mortar inner liner;
  • the A component and the B component are uniformly mixed and mixed, and the epoxy coating is applied to the surface treated cement mortar inner liner by high pressure airless spraying or roller coating.
  • This composite anti-corrosion lining combines the combined performance of active anti-corrosion and passive anti-corrosion.
  • the implementation of the epoxy coating cover layer reduces or isolates the contact between water and cement mortar lining. This is passive anti-corrosion, but also slows or prevents The opportunity for the release of alkaline substances in the cement mortar lining, which ensures that the alkaline material of the cement mortar will be enriched in the inner wall of the ductile iron for a long time, which can passivate the inner wall of the iron pipe.
  • Anti-corrosion guarantees long-term corrosion resistance.
  • the composite anti-corrosion lining reduces or isolates the opportunity of releasing the alkaline material in the cement mortar to the water due to the implementation of the epoxy coating cover layer, thereby ensuring the quality of the water quality. Suppressing the precipitation of alkaline substances in cement mortar lining mainly through the following Can prove that:
  • the dynamic long-term sealing performance is detected by flushing the cover layer with water flow rate of 1.8 ⁇ 3.5m/s and pH 8 for 3 months, and continuously pressurizing and decompressing to detect circulating water.
  • the pH is 8 ⁇ pH 9.5.
  • the prepared pH 8 water is filled into the entire anticorrosive lining cast iron pipe or pipe. After soaking for 2 months, the pH value of the soaking water is changed to L 0.5.
  • the water-based epoxy cover layer material does not contain any organic solvent, and the cover layer is non-toxic after drying. Therefore, it can be used as an anti-corrosion lining for drinking water pipes, which will not pollute the water quality and will not produce harmful substances.
  • the surface of the water-based epoxy cover layer is smooth, which reduces the frictional resistance, increases the water flow speed, and saves the transport energy.
  • the above-mentioned cast iron pipe or pipe fitting with composite anti-corrosion lining has the performance that the inner lining layer does not peel and is not damaged in the hydraulic circulation environment.
  • the anti-corrosion lining pipe of the invention adopts DN100 ductile iron pipe, and the specific preparation process is as follows:
  • This step is a prior art.
  • the cement mortar mixture is placed on the inner wall of the cast iron pipe by screw feeding or pumping while rotating on the centrifuge through the cast iron pipe, and It is evenly distributed in the axial direction of the ductile iron pipe, and then the cast iron pipe is rotated at a high speed, and the cement mortar lining is evenly distributed by centrifugal action to form a cement mortar inner lining; in this way, the cement mortar lining is closely matched with the cast iron pipe.
  • the wall is attached to each other to increase the adhesion between the cement mortar lining and the cast iron pipe wall, and to reduce defects such as hollow drums.
  • This step is prior art.
  • the cement mortar lining is sprayed or hand-applied. Spraying the cement mortar through the high-speed rotating nozzle to the inner surface of the pipe, or using a mortar spray gun to pass the compressed air The cement mortar is sprayed onto the inner surface of the pipe to form a cement mortar inner liner of a certain thickness.
  • the cement mortar inner liner is maintained by steam curing method.
  • the curing temperature is 40°C-80°C, the humidity is over 90%, and the curing time is between 7h-12h.
  • This kind of health preservation method can make the cement mortar lining. 28 days of natural health intensity with a strength of more than 70% in a short period of time;
  • the A component and the B component are uniformly mixed in proportion, and the epoxy coating is applied to the surface treated cement mortar inner liner by a prior art high pressure airless spraying or roll coating.
  • the manufacturing method of the water-based epoxy coating is as follows:
  • Epoxy resin E-51 is uniformly mixed with a reactive diluent, wherein the reactive diluent means allyl glycidyl ether and/or butyl glycidyl ether.
  • B component manufacturing method Add all the required epoxy resin curing agent to the container, and mix 80 80% by mass of the desired deionized water, 20% to 40% by mass of the desired defoamer, all under slow stirring.
  • the required wetting and dispersing agent, all the required pigments and fillers are slowly added, and then the speed is increased to 1000 minutes at 1000 rpm to 2000 rpm, then sanded to a fineness of 40 um, and finally the remaining water and the remaining defoaming agent are added. All the required thixotropic agents were mixed at a low speed of 200-600 rpm for 30 min and filtered.
  • Test method Visually determine the cast iron pipe with composite anti-corrosion lining.
  • Test method The prepared pH 8 water is filled in a cast iron pipe with a composite anti-corrosion lining. After soaking for 2 months, the pH value of the soaking water is detected.
  • Test method The cast iron pipe with composite anti-corrosion lining is flushed with the standard water circulation of 1.8-3.5 m/s and pH 8 for 3 months, and the pressure of the circulating water is continuously pressurized and decompressed. value.
  • a pressure cycle process consists of 1) and 2).
  • Epoxy coating cover layer No blistering, falling off on the cover layer, no blistering, falling off on the cover layer, no blistering, blistering
  • Cyclic water pressure test is good, good focus, good shedding. It can be seen from Table 3 that the thickness of the cover layer of waterborne epoxy coating is 20-250 ⁇ , which can inhibit the alkali lining of cement mortar, and can withstand up to 35bar hydraulic pressure. The cycle test showed that the cover layer had no problem of foaming, falling off, and decreased adhesion.
  • the composite anti-corrosion lining of the invention combines the comprehensive properties of active anti-corrosion and passive anti-corrosion:
  • the implementation of the epoxy coating cover layer reduces or isolates the contact opportunity of water with the cement mortar lining, which is passive anti-corrosion, and also slows or blocks the cement.
  • the waterborne epoxy cover layer material does not contain any organic solvents, and the cover layer is non-toxic after drying. Therefore, it can be used as an anti-corrosion lining for drinking water pipes, which will not pollute the water quality and will not produce harmful substances.
  • the water-based epoxy cover layer has a smooth surface, reduces frictional resistance, increases water flow speed, and saves energy.
  • Cast iron pipe or pipe fitting with composite anti-corrosion lining which has the performance that the inner lining layer does not peel and not break in the hydraulic circulation environment. All of the above advantages make the composite anticorrosive liner of the present invention comprising a waterborne epoxy coating cover layer and its use which can be manufactured or used in the industry better than the prior art.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)

Abstract

一种含有水性环氧涂料封面层的复合防腐内衬，该复合防腐内衬由水泥砂浆内衬层和在水泥砂浆内衬层上涂覆的水性环氧涂料封面层组成。制造上述复合防腐内衬的方法和具有上述复合防腐内衬的铸铁管及铸铁管件。该复合防腐内衬可以抑制水泥砂浆中的碱性物质及有害成分的析出；水性环氧涂料封面层可将水泥砂浆中的水份密封起来，阻止裂紋的产生；同时兼具了水泥砂浆内衬的主动防腐与有机涂层的被动防腐性能；可减小水泥砂浆内衬的糙率系数；该复合防腐内衬能经受在输水过程中水压的升降变化，而防腐内衬不受损害。该复合防腐内衬可应用于铸铁管。

Description

含有水性环氧涂料封面层的复合防腐内衬及其应用
技术领域
本发明涉及一种环氧涂料的应用。
背景技术
目前用于铸铁管的防腐内衬一般有两种， 一种是一般的水泥砂浆内衬， 另一种是有机涂 料防腐内衬。
水泥砂浆内衬对球铁管具有好的防腐性能， 属于主动防腐， 但是由于其固有的碱性特征， 使其在管道， 尤其小口径管道的输水初期引起水质的 pH值升高、 铝离子含量的升高， 影响 水质的卫生性能。 有机涂料防腐内衬 （例如环氧、 聚氨酯内衬） 虽然解决了这一问题， 但是 要在铸铁管内壁喷涂一层这样的内衬， 其厚度必须 500μιη才能达到一定的防腐效果， 从而 使得价格昂贵， 这样的防腐方式属于被动防腐。 例如， 中国专利 CN1250856A公开了一种免 烧陶瓷内衬球墨铸铁管及其制法， 其涂层由环氧树脂等构成， 直接喷涂在球墨铸铁管内壁， 涂层厚 1-2毫米。 显然， 这样的厚度必然需要提高生产成本， 同时一旦这样的涂层有一点破 损或者漏涂， 这样的点会给管线带来致命的灾害， 在这些薄弱环节腐蚀加剧， 造成腐蚀穿孔。
而日本专利 JP平 3-14988则公开了一种铸铁管防腐内衬， 在铸铁管 1的内壁依靠离心作 用衬涂一层水泥砂浆内衬 2， 然后再在水泥砂浆层 2上插入一层由聚氯乙烯、 聚乙烯、 聚苯 乙烯形成的圆形内衬膜而形成的具有抗流体腐蚀作用的内衬管。 此专利技术是直接将一个圆 形的树脂膜插入到铸铁管水泥砂浆的表层， 并且利用形状上匹配来防止其剥离。 虽然其利用 多层涂层的方式， 但是， 这里所用的聚乙烯类物质本身的耐冲刷性能不好， 且不容易附着于 纯水泥砂浆上， 一般需要在水泥砂浆内衬中添加有机物质来增强其附着力， 进而使得整个生 产工艺变得更为复杂， 成本也越高。 可见， 选择一种主动防腐与被动防腐相结合的具有优异防腐性能， 并且性价比较高的新 型内衬是铸铁管研究中的关键， 进一步的， 因为在输水过程中不可避免的会遇到压力的升降 以及停机检修再升压的过程， 所以压力循环性能是表征铸铁管及管件是否合格的重要指标， 而该项指标能否合格与涂层厚度有直接关系， 但厚度增加必然导致生产成本的增加， 因此厚 度的限制是这类管及管件研究中的难点。 发明公开
本发明的目的在于提供一种含有水性环氧涂料封面层的复合防腐内衬和一种具有该复合 防腐内衬的铸铁管及管件。 该复合防腐内衬具有以下优点： 水性环氧涂料封面层可以抑制水 泥砂浆中的碱性物质及有害成分的析出， 保证水质的卫生性能； 水性环氧涂料封面层可将砂 浆中的水份密封起来， 促进水泥砂浆的水合反应， 利于养生， 阻止裂纹的产生； 同时水性环 氧涂料封面层与水泥砂浆内衬结合， 兼具了水泥砂浆内衬的主动防腐与有机涂层被动防腐性 能， 即使环氧封面层有破损和漏涂点， 那么水泥砂浆内衬就会提供主动防腐， 保证了管线的 长期防腐性； 含有复合防腐内衬的铸铁管内壁光滑， 可减小水泥砂浆内衬的糙率系数， 相比 水泥内衬具有提高水力性能的作用； 该复合防腐内衬能经受在输水过程中水压的升降变化， 而防腐内衬不受损害； 此外， 本复合防腐内衬的综合成本比有机涂料防腐内衬低得多， 可有 效地降低管线的综合成本。
本发明含有水性环氧涂料封面层的复合防腐内衬，其由水泥砂浆内衬层和在水泥砂浆内 衬层上涂覆的水性环氧涂料封面层组成。
本发明含有水性环氧涂料封面层的复合防腐内衬，其中所述水性环氧涂料封面层的水性 环氧涂料由 A组分和 B组分组成， 其中
A组分由按质量百分数计的下列组分组成：
环氧树脂 E-51 10.0-50.0%
烯丙基缩水甘油醚和 /或丁基缩水甘油醚 0-5.0%;
B 组分由按质量百分数计的下列组分组成：
水性环氧树脂固化剂 20.0-60.0%
去离子水 20.0-55.0%
颜填料 0-50.0%
润湿分散剂 0-4.0%
消泡剂 0-1.0%
触变剂 0-2.0%;
水性环氧树脂固化剂是指具有自乳化作用的改性聚酰胺或具有自乳化作用的改性脂肪胺 或具有自乳化作用的环氧-多胺加成物， 水性环氧涂料封面层的厚度为 20-250μηι。上述质量百 分数是指相应组分在水性环氧涂料中所占的质量百分数。 烯丙基缩水甘油醚简写为 AGE, 丁 基缩水甘油醚简写为 BGE。 本发明含有水性环氧涂料封面层的复合防腐内衬， 其中所述水性环氧涂料封面层的水性 环氧涂料由 A组分和 B组分组成， 其中
A组分由按质量百分数计的下列组分组成：
环氧树脂 E-51 15.0-30.0%
烯丙基缩水甘油醚和 /或丁基缩水甘油醚 0-4.0%;
B 组分由按质量百分数计的下列组分组成：
水性环氧树脂固化剂 27-45.0%
去离子水 24.0-50.0%
颜填料 0-30.0%
润湿分散剂 0-1.0%
消泡剂 0-0.5%
触变剂 0-0.9%。
本发明含有水性环氧涂料封面层的复合防腐内衬，其中所述自乳化型改性聚酰胺优选为： 美国气体化工产品公司生产的 ANQUAMINE360、 ANQUAMINE287; 所述自乳化型改性脂肪 胺优选为： Shell公司的 8573-wy-60; 美国气体公司的 ANQUAMINE 701、 ANQUAMINE72K ANQUAMINE777； 江苏圣杰特种环氧树脂有限公司的 HTW-208； COGNIS公司的 WATERPOXY 751； 所述自乳化型环氧-多胺加成物优选为： 青岛海洋化工研究院生产的 本发明含有水性环氧涂料封面层的复合防腐内衬， 其中所述颜填料优选为： 钛白粉和 /或 滑石粉和 /或石英粉和 /或炭黑和 /或沉淀硫酸钡。
本发明含有水性环氧涂料封面层的复合防腐内衬， 其中所述触变剂为有机膨润土或二氧 化硅或氢化蓖麻油； 所述消泡剂为非离子型表面活性剂或醚改性聚硅氧烷基消泡剂或双胞表 面活性剂或分子级消泡剂； 所述润湿分散剂为非离子表面活性剂或聚合型润湿分散剂或双胞 表面活性剂或高分子量润湿分散剂。 本发明中触变剂、 消泡剂、 润湿分散剂均是常规选择。
消泡剂为分子级消泡剂时， 优选为： Surfynol MD 20或 Surfynol MD30; 消泡剂为非离子 型表面活性剂时， 优选的为 Surfynol 400 系列产品； 消泡剂为醚改性聚硅氧烷基消泡剂时， 可选择： Surfynol DF-62或 Foamex 815N或 Foamex 822; 消泡剂为双胞表面活性剂时， 优选的 为 EnviroGem AD01。
湿润分散剂为非离子表面活性剂时， 可选择 Surfynol 400 系列产品， 优选的为 Surfynol 420， 湿润分散剂为聚合型润湿分散剂时， 优选的为 TEGO Dispers 715W; 湿润分散剂为双 胞表面活性剂时， 优选的为 TEGO Twin 4000或 EnviroGem ADO 1 ; 湿润分散剂为高分子量润湿 分散剂， 优选的为 DISPERBYK-190。
本发明含有水性环氧涂料封面层的复合防腐内衬，其中所述水性环氧涂料封面层的厚度， 优选为 40-250μιη， 更优选为 40-200μιη。
本发明含有水性环氧涂料封面层的复合防腐内衬， 其中所述水泥砂浆内衬层的原料由按 质量份计的以下组份组成：波特兰水泥或抗硫酸盐水泥： 100份，河砂： 100-150份，水： 30-70 份， 减水剂： 0-1.5份。
减水剂可选自： 聚羧酸系高性能减水剂。
本发明含有水性环氧涂料封面层的复合防腐内衬， 其中所述水泥砂浆内衬层的厚度为 1.5-15mm; 优选为 3-13mm; 更优选为 5.5-10mm。 水泥砂浆内衬层的厚度根据管径的不同有 所变化， 对于铸铁管内壁， 最小值为 1.5 毫米的水泥砂浆内衬足以保证铸铁管抗腐蚀， 然而 铸铁管在铸造的过程中内壁会有铸铁渣层， 管径越大， 渣层越厚， 水泥砂浆内衬的厚度过薄 会遮盖不住铸铁渣层； 当然水泥砂浆内衬过厚， 会造成原料的浪费， 不仅会造成内径的减小 而且会导致环氧涂层涂覆的困难。 所得到的水泥砂浆内衬按照 ASTM D4541标准， 拉拔强度 在 2-8MPa。
一种含有水性环氧涂料封面层的复合防腐内衬的制造方法， 其特征在于： 包括以下步骤: ( 1 )水泥砂浆内衬层的制造、 养生、 表面处理， （2)采用高压无气喷涂或滚涂的方式将环氧 涂料涂覆于经过表面处理的水泥砂浆内衬层上， 其中所用水性环氧涂料的制造方法如下：
A组分制造方法： 将环氧树脂 E-51与活性稀释剂按比例混合均匀， 其中活性稀释剂是指 烯丙基缩水甘油醚和 /或丁基缩水甘油醚。
B组分制造方法： 在容器中加入全部的所需环氧树脂固化剂， 在缓慢搅拌下将 50 80质 量％的所需去离子水、 20%~40质量％的所需消泡剂、 全部的所需润湿分散剂、 全部的所需颜 填料缓慢加入， 然后提升速度至在 1000rpm-2000rpm高速分散 10min， 然后进行砂磨至细度 40um， 最后再加入剩余的水、 剩余的消泡剂、 全部的所需触变剂， 在 200— 600rpm低速下 混合 30min， 过滤。
A组分和 B组分混合使用， 现混现用。
本发明具有复合防腐内衬的铸铁管， 由铸铁管和在铸铁管内壁上衬涂的上述之一复合防 腐内衬组成。
本发明具有复合防腐内衬的铸铁管， 其中所述铸铁管的铸铁材料为球墨铸铁。
本发明具有复合防腐内衬的铸铁管件， 由铸铁管件和在铸铁管件内壁上衬涂的上述之一 的复合防腐内衬组成。
本发明具有复合防腐内衬的铸铁管件， 其中所述铸铁管件的铸铁材料为球墨铸铁。 本发明具有复合防腐内衬的铸铁管或管件的具体制备工艺如下：
( 1 ) 水泥砂浆的衬涂
该步骤是现有技术， 对于铸铁管 （铸铁直管） 来说， 通过铸铁管一边在离心机上旋转， 一边采用螺旋给料或泵送的方式将水泥砂浆拌合料置于铸铁管内壁， 且使之在球墨铸铁管轴 向上分布均匀， 然后使铸铁管高速旋转， 依靠离心作用将水泥砂浆内衬均匀分布形成水泥砂 浆内衬层； 这样的方式可使水泥砂浆内衬紧密地与铸铁管壁相贴， 增加水泥砂浆内衬与铸铁 管壁之间的附着力， 减少空鼓等缺陷。
该步骤是现有技术， 对于铸铁管件 （异形管） 来说， 水泥砂浆内衬则采用喷涂或手工涂 抹， 喷涂是将水泥砂浆通过高速旋转喷头喷涂到管内表面,或者用砂浆喷枪通过压缩空气将水 泥砂浆喷涂到管内表面， 形成一定厚度的水泥砂浆内衬层。
(2) 水泥砂浆内衬的养生
采用蒸汽养生的方式对水泥砂浆内衬层进行养生， 养生温度为 40°C-80°C， 湿度为 90% 以上， 养生时间为 7h-12h之间， 这样的养生方式可以使水泥砂浆内衬在短时间内的强度达到 70%以上的 28天自然养生强度；
(3 ) 水泥砂浆内衬的表面处理
水泥砂浆内衬层养生后，采用内磨和 /或压力水冲洗和 /或喷砂的方式对水泥砂浆内衬层表 面进行处理， 去掉表面浮浆等污物； 采用压力水冲洗或高压风吹走水泥砂浆内衬层的灰尘等 污物；
(4) 水性环氧涂料的涂覆
首先按比例将 A组分与 B组分混合均匀， 现混现用， 采用高压无气喷涂或滚涂的方式将 环氧涂料涂覆于经过表面处理的水泥砂浆内衬层上。
本发明具有复合防腐内衬的铸铁管或管件具有以下优点和积极效果：
1. 此复合防腐内衬结合了主动防腐与被动防腐的综合性能， 即环氧涂料封面层的实施减 少或隔绝了水与水泥砂浆内衬的接触机会， 此为被动防腐， 同时也减缓或阻止了水泥砂浆内 衬中的碱性物质向外释放的机会， 这也就保证了水泥砂浆的碱性物质会长久的富集于球铁管 的内壁， 可使铁管内壁钝化， 此为主动防腐， 保证了长久的防腐性。
2、此复合防腐内衬由于环氧涂料封面层的实施， 减少或隔绝了水泥砂浆内衬碱性物质向 水中释放的机会， 从而保证了水质的质量。 抑制水泥砂浆内衬碱性物质析出主要通过如下性 能来证明：
1 ) 动态长期密封性能
动态长期密封性能的检测， 是将所述铸铁管或管件， 用流速为 1.8~3.5m/s 、 pH值为 8 的水循环冲刷封面层 3个月， 且不断增压、 减压， 检测循环水的 pH值为 8<pH 9.5。
2) 静态长期密封性能
将配制的 pH值为 8的水充满整个防腐内衬铸铁管或管件内， 浸泡 2个月后， 检测浸泡 水的 pH值变化 L 0.5。
3、 水性环氧封面层材料不含任何有机溶剂， 封面层干燥后无毒。 因此， 完全可以作为饮 用水管道防腐内衬， 不会对水质造成污染， 不会产生对人体有害的物质。
4、 水性环氧封面层表面光滑， 降低了摩擦阻力， 加大了水流速度， 节省了输送能量。
5、上述具有复合防腐内衬的铸铁管或管件， 具有液压循环环境中内衬层不剥离不破损的 性能。
实施发明的最佳方式
下面结合具体实施例对本发明作进一步说明：
本发明的防腐内衬管采用 DN100球墨铸铁管， 具体制备工艺如下：
( 1 ) 水泥砂浆的衬涂
该步骤是现有技术， 对于铸铁管 （铸铁直管） 来说， 通过铸铁管一边在离心机上旋转， 一边采用螺旋给料或泵送的方式将水泥砂浆拌合料置于铸铁管内壁， 且使之在球墨铸铁管轴 向上分布均匀， 然后使铸铁管高速旋转， 依靠离心作用将水泥砂浆内衬均匀分布形成水泥砂 浆内衬层； 这样的方式可使水泥砂浆内衬紧密地与铸铁管壁相贴， 增加水泥砂浆内衬与铸铁 管壁之间的附着力， 减少空鼓等缺陷。
该步骤是现有技术， 对于铸铁管件 （异形管） 来说， 水泥砂浆内衬则采用喷涂或手工涂 抹， 喷涂是将水泥砂浆通过高速旋转喷头喷涂到管内表面,或者用砂浆喷枪通过压缩空气将水 泥砂浆喷涂到管内表面， 形成一定厚度的水泥砂浆内衬层。
(2) 水泥砂浆内衬的养生
采用蒸汽养生的方式对水泥砂浆内衬层进行养生， 养生温度为 40°C-80°C， 湿度为 90% 以上， 养生时间为 7h-12h之间， 这样的养生方式可以使水泥砂浆内衬在短时间内的强度达到 70%以上的 28天自然养生强度；
(3 ) 水泥砂浆内衬的表面处理 水泥砂浆内衬层养生后，采用内磨和 /或压力水冲洗和 /或喷砂的方式对水泥砂浆内衬层表 面进行处理， 去掉表面浮浆等污物； 采用压力水冲洗或高压风吹走水泥砂浆内衬层的灰尘等 污物；
(4) 水性环氧涂料的涂覆
首先按比例将 A组分与 B组分混合均匀，采用现有技术高压无气喷涂或滚涂的方式将环 氧涂料涂覆于经过表面处理的水泥砂浆内衬层上。 其中所用水性环氧涂料的制造方法如下：
A组分制造方法： 将环氧树脂 E-51与活性稀释剂按比例混合均匀， 其中活性稀释剂是指 烯丙基缩水甘油醚和 /或丁基缩水甘油醚。
B组分制造方法： 在容器中加入全部的所需环氧树脂固化剂， 在缓慢搅拌下将 50 80质 量％的所需去离子水、 20%~40质量％的所需消泡剂、 全部的所需润湿分散剂、 全部的所需颜 填料缓慢加入， 然后提升速度至在 1000rpm-2000rpm高速分散 10min， 然后进行砂磨至细度 40um， 最后再加入剩余的水、 剩余的消泡剂、 全部的所需触变剂， 在 200— 600rpm低速下 混合 30min， 过滤。
采用上述方法分别按照表 1-表 3所列组分生产，获得具有复合防腐内衬的铸铁管或管件:
表 1 水泥砂浆内衬层原料的组成
Figure imgf000008_0001
水性环氧涂料的组成以及厚度
Figure imgf000009_0001
不同厚度、 组成的内衬铸铁管的性能,通过对水泥砂浆内衬的不同厚度环氧封面层表观现 象、 浸泡水 pH值变化的检测、 液压循环试验结果的考察， 短期密封性能、 动态长期密封性 能结果的考察， 来确定封面层厚度的范围。
1、 水性环氧涂料封面层表面状况的测定
a、 试验方法： 对具有复合防腐内衬的铸铁管进行目测确定。
b、 评价方法： 〇——表示表面光滑； □——表示表面平整； △——表示可覆盖水泥砂浆 内衬。
2、 水性环氧涂料封面层静态长期密封性能的测定
a、 试验方法： 将配制的 pH值为 8的水充满具有复合防腐内衬的铸铁管内， 浸泡 2个月 后， 检测浸泡水的 pH值变化。
b、评价方法：〇——管内水质 pH值增加的量 0.5 ; X——管内水质 pH值增加的量 1.0。
3、 水性环氧涂料封面层动态长期密封性能的测定
a、 试验方法： 将具有复合防腐内衬的铸铁管用流速为 1.8-3.5m/s， pH值为 8的标准水循 环冲刷封面层 3个月， 且不断增压、 减压， 检测循环水的 pH值。
b、评价方法： 〇——经过 3个月后， 管内循环水的 pH值为 8 <pH 9.5， 并且封面层完好； X——经过 3个月后， 管内水质 pH值 pH>9.5， 且封面层起泡、 脱落现象。
4、 水性环氧涂料封面层液压循环性能的测定
a、 试验方法：
1 )带有水泥砂浆环氧涂料封面层的防腐内衬铸铁管及其管件， 两端密封， 安装压力表以 及相关注水设备；
2 ) 向管子内注水， 升压至压力 16-35bar， 并保压 2h;
3 ) 然后泄压至 0压力， 保压两小时；
4 ) 由 1 ) 和 2) 组成一个压力循环过程。
5 ) 共进行 30个循环。
b、 评价方法： 起泡、 脱落状态目测确定， 通过用刀片刮的难易程度来确定附着力情况。 表 3 复合防腐内衬的组成及性能测试
Figure imgf000010_0001
环氧涂料封面层 环氧涂料封面层表
□ 〇 〇 〇 〇 □ 〇 〇 〇 〇 〇 Δ 面状况
环氧涂料封面层
〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 X 静态长期密封性能
环氧涂料封面层动
〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 X X 态长期密封性能
封面层 封面层
环氧涂料封面层 封面层无起泡、 脱落、 附 封面层无起泡、 脱落、 附 无起泡、 有起泡
循环水压试验 着力良好 着力良好 脱落现 现象 从表 3可以看出，水性环氧涂料封面层厚度在 20-250μιη之间对水泥砂浆内衬碱性都有抑 制作用， 可最高承受高达 35bar的液压循环试验， 且该封面层没有起泡、 脱落、 附着力下降 的问题。 工业实用性
本发明复合防腐内衬结合了主动防腐与被动防腐的综合性能： 环氧涂料封面层的实施减 少或隔绝了水与水泥砂浆内衬的接触机会， 此为被动防腐， 同时也减缓或阻止了水泥砂浆内 衬中的碱性物质向外释放的机会， 这也就保证了水泥砂浆的碱性物质会长久的富集于球铁管 的内壁， 可使铁管内壁钝化， 此为主动防腐， 保证了长久的防腐性。
水性环氧封面层材料不含任何有机溶剂， 封面层干燥后无毒。 因此， 完全可以作为饮用 水管道防腐内衬， 不会对水质造成污染， 不会产生对人体有害的物质。
水性环氧封面层表面光滑， 降低了摩擦阻力， 加大了水流速度， 节省了输送能量。
具有复合防腐内衬的铸铁管或管件， 具有液压循环环境中内衬层不剥离不破损的性能。 以上各优点都使得本发明含有水性环氧涂料封面层的复合防腐内衬及其应用能够比现有 技术更好的在工业中制造或使用。

Claims

权利要求
1、 一种含有水性环氧涂料封面层的复合防腐内衬， 其特征在于： 由水泥砂浆内衬层和在水泥 砂浆内衬层上涂覆的水性环氧涂料封面层组成。
2、 根据权利要求 1所述的含有水性环氧涂料封面层的复合防腐内衬， 其特征在于： 所述水性 环氧涂料封面层的水性环氧涂料由 A组分和 B组分组成， 其中：
A组分由按质量百分数计的下列组分组成：
环氧树脂 E-51 10.0-50.0%
烯丙基缩水甘油醚和 /或丁基缩水甘油醚 0-5.0%;
B 组分由按质量百分数计的下列组分组成：
水性环氧树脂固化剂 20.0-60.0%
去离子水 20.0-55.0%
颜填料 0-50.0%
润湿分散剂 0-4.0%
消泡剂 0-1.0%
触变剂 0-2.0%;
水性环氧树脂固化剂是指具有自乳化作用的改性聚酰胺或具有自乳化作用的改性脂肪胺 或具有自乳化作用的环氧-多胺加成物， 所述水性环氧涂料封面层的厚度为 20-250μιη。
3、 根据权利要求 2所述的含有水性环氧涂料封面层的复合防腐内衬， 其特征在于： 所述水性 环氧涂料封面层的水性环氧涂料由 Α组分和 B组分组成， 其中
A组分由按质量百分数计的下列组分组成：
环氧树脂 E-51 15-30.0%
烯丙基缩水甘油醚和 /或丁基缩水甘油醚 0-4.0%;
B 组分由按质量百分数计的下列组分组成：
水性环氧树脂固化剂 27-45.0%
去离子水 24.0-50.0%
颜填料 0-30.0%
润湿分散剂 0-1.0%
消泡剂 0-0.5% 触变剂 0-0.9%。
4、 根据权利要求 2或 3所述的含有水性环氧涂料封面层的复合防腐内衬， 其特征在于： 所述 颜填料为： 钛白粉和 /或滑石粉和 /或石英粉和 /或炭黑和 /或沉淀硫酸钡。
5、 根据权利要求 4所述的含有水性环氧涂料封面层的复合防腐内衬， 其特征在于： 所述触变 剂为有机膨润土或二氧化硅或氢化蓖麻油； 所述消泡剂为非离子型表面活性剂或醚改性聚硅 氧烷基消泡剂或双胞表面活性剂或分子级消泡剂； 所述润湿分散剂为非离子表面活性剂或聚 合型润湿分散剂或双胞表面活性剂或高分子量润湿分散剂。
6、 根据权利要求 2-5之一所述的含有水性环氧涂料封面层的复合防腐内衬， 其特征在于： 所 述水性环氧涂料封面层的厚度优选为 40-250μιη， 更优选为 40-200μιη。
7、 根据权利要求 3所述的含有水性环氧涂料封面层的复合防腐内衬， 其特征在于： 所述水泥 砂浆内衬层的原料由按质量份计的以下组份组成： 波特兰水泥或抗硫酸盐水泥： 100 份， 河 砂： 100-150份， 水： 30-70份， 减水剂： 0-1.5份。
8、 根据权利要求 2-7之一所述的含有水性环氧涂料封面层的复合防腐内衬， 其特征在于： 所 述水泥砂浆内衬层的厚度为 1.5-15mm; 优选为 3-13mm; 更优选为 5.5-10mm。
9、 一种如权利要求 2-8之一所述的含有水性环氧涂料封面层的复合防腐内衬的制造方法， 其 特征在于： 包括以下步骤： （1 ) 水泥砂浆内衬层的制造、 养生、 表面处理， （2) 将环氧涂料 涂覆于经过表面处理的水泥砂浆内衬层上， 其中所用水性环氧涂料的制造方法如下：
A组分制造方法： 将环氧树脂 E-51与活性稀释剂按比例混合均匀， 其中活性稀释剂是指 烯丙基缩水甘油醚和 /或丁基缩水甘油醚；
B组分制造方法： 在容器中加入全部的所需环氧树脂固化剂， 在缓慢搅拌下将 50 80质 量％的所需去离子水、 20%~40质量％的所需消泡剂、 全部的所需润湿分散剂、 全部的所需颜 填料缓慢加入， 然后提升速度至在 1000rpm-2000rpm高速分散 10min， 然后进行砂磨至细度 40um， 最后再加入剩余的水、 剩余的消泡剂、 全部的所需触变剂， 在 200— 600rpm低速下 混合 30min， 过滤；
A组分和 B组分混合使用。
10、 一种具有复合防腐内衬的铸铁管， 其特征在于： 由铸铁管和在铸铁管内壁上衬涂的、 如 权利要求 1-8之一所述的复合防腐内衬组成。
11、 根据权利要求 10所述的具有复合防腐内衬的铸铁管， 其特征在于： 铸铁管的铸铁材料为 球墨铸铁。
12、 一种具有复合防腐内衬的铸铁管件， 其特征在于： 由铸铁管件和在铸铁管件内壁上衬涂 的、 如权利要求 1-8之一所述的复合防腐内衬组成。
13、根据权利要求 12所述的具有复合防腐内衬的铸铁管件， 其特征在于： 铸铁管件的铸铁材 料为球墨铸铁。
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